The problem seems to be unresolved:
dpkg -l | grep grub
ii grub-common 1.99~rc1-8ubuntu1
GRand Unified Bootloader, version 2 (common files)
ii grub-pc 1.99~rc1-8ubuntu1
GRand Unified Bootloader, version 2 (PC/BIOS version)
cat /var/log/syslog
Apr 4 18:59:06 debconf: --> GET cdrom-detect/hybrid
Apr 4 18:59:06 debconf: <-- 10 cdrom-detect/hybrid doesn't exist
Apr 4 18:59:06 debconf: --> SET grub-installer/bootdev /dev/sda /dev/sdb
Apr 4 18:59:06 debconf: <-- 0 value set
Apr 4 18:59:06 debconf: --> PROGRESS STEP 1
Apr 4 18:59:06 debconf: <-- 0 OK
Apr 4 18:59:06 debconf: --> PROGRESS INFO grub-installer/progress/step_bootdev
Apr 4 18:59:06 debconf: <-- 0 OK
Apr 4 18:59:06 debconf: --> INPUT high grub-installer/only_debian
Apr 4 18:59:06 debconf: <-- 30 question skipped
Apr 4 18:59:06 debconf: --> GO
Apr 4 18:59:06 debconf: <-- 0 ok
Apr 4 18:59:06 debconf: --> GET grub-installer/only_debian
Apr 4 18:59:06 debconf: <-- 0 true
Apr 4 18:59:06 debconf: --> GET grub-installer/bootdev_directory
Apr 4 18:59:06 debconf: <-- 0
Apr 4 18:59:06 debconf: --> PROGRESS STEP 1
Apr 4 18:59:06 debconf: <-- 0 OK
Apr 4 18:59:06 debconf: --> SUBST grub-installer/progress/step_install_loader
BOOTDEV /dev/sda /dev/sdb
Apr 4 18:59:06 debconf: Adding [BOOTDEV] -> [/dev/sda /dev/sdb]
Apr 4 18:59:06 debconf: <-- 0
Apr 4 18:59:06 debconf: --> PROGRESS INFO
grub-installer/progress/step_install_loader
Apr 4 18:59:06 debconf: <-- 0 OK
Apr 4 18:59:06 grub-installer: info: Installing grub on '/dev/sda /dev/sdb'
Apr 4 18:59:06 grub-installer: info: grub-install supports --no-floppy
Apr 4 18:59:06 grub-installer: info: Running chroot /target grub-install
--no-floppy --force "/dev/sda"
Apr 4 18:59:06 grub-installer: /usr/sbin/grub-probe: error: no such disk.
Apr 4 18:59:06 grub-installer: Auto-detection of a filesystem of /dev/md0
failed.
Apr 4 18:59:06 grub-installer: Please report this together with the output of
"/usr/sbin/grub-probe --device-map="/boot/grub/device.map" --target=fs -v
/boot/grub" to <bug-g...@gnu.org>
Apr 4 18:59:06 grub-installer: error: Running 'grub-install --no-floppy
--force "/dev/sda"' failed.
Apr 4 18:59:06 debconf: --> SUBST grub-installer/grub-install-failed BOOTDEV
/dev/sda
Apr 4 18:59:06 debconf: Adding [BOOTDEV] -> [/dev/sda]
Apr 4 18:59:06 debconf: <-- 0
Apr 4 18:59:06 debconf: --> INPUT critical grub-installer/grub-install-failed
Apr 4 18:59:06 debconf: <-- 0 question will be asked
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https://bugs.launchpad.net/bugs/743136
Title:
grub2 fails to install on md0
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